My boyfriend and Porn
My boyfriend looks at porn every day and denies it even when i approach him in a non accusing way. He watches it more than we have sex and usually finishes without getting me off. It makes me feel like i'm not good enough and i don't know what to do.

Take a look at the site wwww.makelovenotporn.com -- it's a fun, simple site that highlights the differences between porn-sex and real world sex. When you say that he finishes without getting you off, do you feel like that's a function of the kind of sex he watches on porn and believes that it passes for real world sex, or do you think that he has a problem with premature ejaculation, which would be separate from any issues regarding porn? Is his porn-viewing affecting his desire for you? Do you feel like he prefers porn? I think you should both check out that site as a starting-point.
To help you navigate this situation you're in, I wonder if he's embarrassed, ashamed, in defensive mode or something else that he's denying what he's doing. Hopefully, checking out the site that Ian suggestion can lead you to a conversation that can uncover the reason for his denial.
In regard to not getting you off, I wonder if there was ever a time in your relationship when he was consistently satisfying you, or if not getting you off is his usual M.O. If it was like this in the beginning of your relationship, it'll say a lot! And, I'm happy to comment on that when I learn more.
I am all for couples having their privacy about when and what they look at porn but your boyfriend's use sounds excessive.
It sounds like the two of you need discussions about satifsying each other. If he wants to look at porn that is his right however if it is interfering with your relationship's sexual needs and he is denying his use, it is pointing to a more serious problem.
Hopefully he is willing to hear you out on this and examine how it is interfering in your relationship and come to a healthy place with that. If not, I recommend you both go to a relationship therapist who specializes in sexual problems to help you sort this out.